Void Double Hull Space Type VLCC

概要

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Double hull structures for tankers became obligatory in 1993 in response to the ever present problem of oil spills. Use of the double hull space as ballast water tanks has resulted in new problems-an increased area of hull requiring maintenance, and the need for inspections and maintenance work in the cramped and unfavorable environment of the double hull spaces. As a solution to these problems, the authors have developed a new concept for double hulled tankers which involves the double hull space being void, while the ballast water tanks are laid out in the form of large wing tanks as is the case with conventional single hull tankers As the double hull spaces are void they are subject to minimal corrosion, thus reducing maintenance and inspection work. This paper primarily discusses the advantages of maintenance and inspection in relation to corrosion of ballast water tanks, as well as a consideration of the superiority of this design in preventing oil spills due to corrosion penetration of the hull. The ability to prevent oil spills in terms of energy of collision, and fatigue strength of longitudinal members in the double hull space, is also investigated.
財団法人日本海事協会の論文